From patchwork Wed Nov 27 17:50:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 1201712 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47NT2v466tz9sSS for ; Thu, 28 Nov 2019 04:55:51 +1100 (AEDT) Received: from localhost ([::1]:41176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ia1XZ-0002mN-9L for incoming@patchwork.ozlabs.org; Wed, 27 Nov 2019 12:55:49 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:47097) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ia1TB-0008Bh-Fp for qemu-devel@nongnu.org; Wed, 27 Nov 2019 12:51:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ia1TA-0003Rs-9b for qemu-devel@nongnu.org; Wed, 27 Nov 2019 12:51:17 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:56244) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ia1TA-0003PL-0o for qemu-devel@nongnu.org; Wed, 27 Nov 2019 12:51:16 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xARHkVIF097406 for ; Wed, 27 Nov 2019 12:51:13 -0500 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2whcxqv0x8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 27 Nov 2019 12:51:12 -0500 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 27 Nov 2019 17:51:09 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xARHp73K50331876 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 27 Nov 2019 17:51:07 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5B88FA4057; Wed, 27 Nov 2019 17:51:07 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1389BA404D; Wed, 27 Nov 2019 17:51:05 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.82.185]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 27 Nov 2019 17:51:04 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH v4 6/6] s390x: kvm: Make kvm_sclp_service_call void Date: Wed, 27 Nov 2019 12:50:46 -0500 X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191127175046.4911-1-frankja@linux.ibm.com> References: <20191127175046.4911-1-frankja@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19112717-0028-0000-0000-000003C0C680 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19112717-0029-0000-0000-00002483CE4E Message-Id: <20191127175046.4911-7-frankja@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95, 18.0.572 definitions=2019-11-27_04:2019-11-27, 2019-11-27 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 suspectscore=1 spamscore=0 phishscore=0 mlxlogscore=866 bulkscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1911270145 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, pmorel@linux.ibm.com, david@redhat.com, cohuck@redhat.com, borntraeger@de.ibm.com, qemu-s390x@nongnu.org, mihajlov@linux.ibm.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" It defaults to returning 0 anyway and that return value is not necessary, as 0 is also the default rc that the caller would return. While doing that we can simplify the logic a bit and return early if we inject a PGM exception. Also we always set a 0 cc, so let's not base it on the rc of the sclp emulation functions. Signed-off-by: Janosch Frank Reviewed-by: Thomas Huth --- target/s390x/kvm.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index 0c9d14b4b1..08bb1edca0 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -1159,13 +1159,13 @@ void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code) kvm_s390_vcpu_interrupt(cpu, &irq); } -static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, +static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, uint16_t ipbh0) { CPUS390XState *env = &cpu->env; uint64_t sccb; uint32_t code; - int r = 0; + int r; sccb = env->regs[ipbh0 & 0xf]; code = env->regs[(ipbh0 & 0xf0) >> 4]; @@ -1173,11 +1173,9 @@ static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, r = sclp_service_call(env, sccb, code); if (r < 0) { kvm_s390_program_interrupt(cpu, -r); - } else { - setcc(cpu, r); + return; } - - return 0; + setcc(cpu, 0); } static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) @@ -1240,7 +1238,7 @@ static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) setcc(cpu, 3); break; case PRIV_B2_SCLP_CALL: - rc = kvm_sclp_service_call(cpu, run, ipbh0); + kvm_sclp_service_call(cpu, run, ipbh0); break; default: rc = -1;